fly over the river ,fly across the river ,walk over the brid

fly over the river ,fly across the river ,walk over the brid fly over the sky fly away there are some bridges----(above,across,over)the river a bridge over or above or across the river somewhere over the rainbow,bluebirds fly,birds fly over the she swimming across the river she is swimming over the river over the river的意思 Look!The plane____(fly) over the building. ___ is the bridge over the river? over the river和in the river是不是反义词 over the wall与fly over the city是 birds fly over the rainbow是什么意思